package com.example.android;

import static com.example.android.constants.Constants.PROVINCE_URL;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Toast;

import androidx.fragment.app.Fragment;

import com.example.android.databinding.ChooseAreaBinding;
import com.example.android.db.City;
import com.example.android.db.County;
import com.example.android.db.Province;
import com.example.android.util.HttpUtil;
import com.example.android.util.Utility;

import org.jetbrains.annotations.NotNull;
import org.litepal.LitePal;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

public class ChooseAreaFragnent extends Fragment {
    public static final String PROVINCE = "province";
    public static final String CITY = "city";
    public static final String COUNTY = "county";
    ChooseAreaBinding binding;

    public static final int LEVEL_PROVINCE=0;//省
    public static final int LEVEL_CITY=1;//市
    public static final int LEVEL_COUNTY=2;//县
    private int currentLevel = LEVEL_PROVINCE;//当前显示的省级列表

    List<Province> provinceList;//省的集合
    List<City> CityList;//市的集合数据
    List<County> countyList;//县的集合数据

    private  Province selectedProvince;//选中的省份信息
    private  City selectedCity;//选中县的信息

    List<String> dataList = new ArrayList<>();//存放省份名称列表，查名称列表
    ArrayAdapter<String> adapter;

    ProgressDialog progressDialog;//加载进度对话框



    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        binding = ChooseAreaBinding.inflate(inflater,container,false);

        //适配器初始化
        adapter = new ArrayAdapter<>(getActivity(), android.R.layout.simple_list_item_1,dataList);

        //为列表组件设置适配器
        binding.listView.setAdapter(adapter);

        return binding.getRoot();
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        //绑定列表项的点击事件
        binding.listView.setOnItemClickListener(((adapterView, view, position, id) -> {
             if (currentLevel == LEVEL_PROVINCE){
                 selectedProvince = provinceList.get(position);//获取选中项(某个省份)
                 queryCities();//查询城市
             }else if (currentLevel == LEVEL_CITY){
                 selectedCity = CityList.get(position);//获取选中项(某个省份)
                 queryCounties();//查询城市
             }else if(currentLevel == LEVEL_COUNTY){
                 County county = countyList.get(position);
                 String spot = String.format("%s|%s|%s",
                     selectedProvince.getProvinceName(),
                         selectedCity.getCityName(),
                         county.getCountyName());
                 String location = county.getWeatherId().substring(2);
                 Log.d("test", "onActivityCreated: " + spot + "|" + location);

                 Intent intent = new Intent(getActivity(), WeatherActivity.class);
                 intent.putExtra("spot",spot);
                 intent.putExtra("location",location);
                 startActivity(intent);
                 getActivity().finish();

             }
        }));

        binding.backButton.setOnClickListener(v->{
            if (currentLevel == LEVEL_CITY){
                queryProvinces();
            }else if(currentLevel == LEVEL_COUNTY) {
                queryCities();
            }
        });

        queryProvinces();//查询省份
    }

    private void queryCounties() {
        binding.titleText.setText(selectedProvince.getProvinceName() + ":" + selectedCity.getCityName());
        binding.backButton.setVisibility(View.VISIBLE);

        //访问数据库表
        countyList = LitePal.where("cityId=?",
                String.valueOf(selectedCity.getId())).find(County.class);
        if(countyList.size()>0){
            //成功从数据库表中获取数据
            dataList.clear();//清除原来的所有数据
            countyList.forEach(item->{
                dataList.add(item.getCountyName());
            });
            adapter.notifyDataSetChanged();
            binding.listView.setSelection(0);
            currentLevel = LEVEL_COUNTY;
        }else{
            //数据库表示空表，发网络请求，获取数据，填充数据
            String url = PROVINCE_URL + "/" + selectedProvince.getProviceCode() + "/" + selectedCity.getCityCode();
            queryFromServer(url, COUNTY);
        }
    }

    private void queryCities() {
        binding.titleText.setText(selectedProvince.getProvinceName());
        binding.backButton.setVisibility(View.VISIBLE);

        //访问数据库表
        CityList = LitePal.where("provinceId=?",
                String.valueOf(selectedProvince.getId())).find(City.class);
        if(CityList.size()>0){
            //成功从数据库表中获取数据
            dataList.clear();//清除原来的所有数据
            CityList.forEach(item->{
                dataList.add(item.getCityName());
            });
            adapter.notifyDataSetChanged();
            binding.listView.setSelection(0);
            currentLevel = LEVEL_CITY;
    }else{
        //数据库表示空表，发网络请求，获取数据，填充数据
        String url = PROVINCE_URL + "/" + selectedProvince.getProviceCode();
        queryFromServer(url, CITY);
    }
}

    private void queryProvinces() {
        binding.titleText.setText("中国(China)");
        binding.backButton.setVisibility(View.GONE);

        //访问数据库表
        provinceList = LitePal.findAll(Province.class);
        if(provinceList.size()>0){
            //成功从数据库表中获取数据
            dataList.clear();//清除原来的所有数据
            provinceList.forEach(item->{
                dataList.add(item.getProvinceName());
            });
            adapter.notifyDataSetChanged();
            binding.listView.setSelection(0);
            currentLevel = LEVEL_PROVINCE;
        }else{
            //数据库表示空表，发网络请求，获取数据，填充数据
            queryFromServer(PROVINCE_URL, PROVINCE);
        }
    }

    private void queryFromServer(String url, String type) {
        Log.d("text", url);
        showProgressDialog();//显示进度条
        HttpUtil.sendOkHttpRequest(url, new Callback() {
            @Override
            public void onFailure(@NotNull Call call, @NotNull IOException e) {
                getActivity().runOnUiThread(()->{
                    Toast.makeText(getContext(),"访问网络失败！",Toast.LENGTH_SHORT).show();
                    closeProgressDialog();
                });
            }

            @Override
            public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
                 //解析数据，放在子线程中
                String strJson = response.body().string();
                boolean result = false;
                if(PROVINCE.equals(type)){
                    result = Utility.handleProvinceResponse(strJson);//写入数据库表
                }else if(CITY.equals(type)){
                    result = Utility.handleCityResponse(strJson,selectedProvince.getId());
                }else if(COUNTY.equals(type)){
                    result = Utility.handleCountResponse(strJson,selectedCity.getId());
                }
                if(result){
                    if(PROVINCE.equals(type)){
                        getActivity().runOnUiThread(()->{
                            queryProvinces();
                        });
                    }else if(CITY.equals(type)){
                        getActivity().runOnUiThread(()->{
                            queryCities();
                        });
                    }else if(COUNTY.equals(type)){
                        getActivity().runOnUiThread(()->{
                            queryCounties();
                        });
                    }
                    closeProgressDialog();
                }else{
                    getActivity().runOnUiThread(()->{
                        Toast.makeText(getContext(),
                                "数据解析失败",Toast.LENGTH_SHORT).show();
                        closeProgressDialog();
                    });
                }
                //显示数据
            }
        });
    }

    private void closeProgressDialog() {
       if(progressDialog != null){
           progressDialog.dismiss();
       }
    }

    private void showProgressDialog() {
        if(progressDialog == null){
            //创建对话框
            progressDialog = new ProgressDialog(getContext());
            progressDialog.setMessage("正在访问网络，请稍后！");
            progressDialog.setCancelable(false);
        }
        progressDialog.show();
    }
}
